Scaffold bracket



Apr. 3, 1923, 1,450,286

J. F. GRAFF I SCAFFOLD BRACKET Filed Dec. 9, 1920 BRICK VII 5 AIR smut snenrum Q gintfnl nz Patented Apr. 3, 1923.

' u i'rEn era-res JOSEPH F. Genre, or MILWAUKEE, Wisconsin.

ime

ren't Fries.

" SGAFFOLD BRACKET.

Application filedpecember 9, 1920. Serial No. 429,433.

To all whom it may concern Be it known that I, Josnrn, F. GRAPE, a citizen of the United States, residingat Milwaukee, in the county. of Milwaukee and State of Visconsin, have invented certain new and useful Improvements in Scaffold Brackets; and I do hereby declare the following to be a full, clear, and exact description of the invention such as willenable others skilled in the art to which it appertains to make and use the same.

. This invention appertains tofolding scaffold brackets and means for securing such and other brackets to the wall of a building or the like.

' similar reference characters designate similar parts in all of the several views:

Figure 1 is a side elevation of my, 1m-

proved'bracket shown in'pos'ition upon a wall; a

Figure fragment ofwall on the line 2-2 of Figure brackets attached.

cates a stud, B a sheathing, C an air spacev 1 showing an upper plan view= of the bracket-attaching stirrup and a fragment of the bracket, connected therewith;

Figure 3 is a perspective view of the bracket detached from the wall and from the supporting stirrup and in process of being folded Figures 1 and 2, respectively, indicate a vertical and a horizontal section through the wall of a building with one of my improved In said figures A indiand D a veneer of brick or the like. This illustration of a wall-is diagrammatic only and serves to illustrate the mode of application of my improved bracket to the wall of a building.

As a means for fastening the improved bracket to a wall I have devised a stirrup 1. This stirrup is made, preferably, of wrought plate or strap iron or steel of U-shaped form,

of course be varied at will.

2 is a horizontal section through a a with parallel side armsspaced apart a sufficient distance to enable it to embrace a stud A and of'sufficient length to extendfconn pletely through the wall of a building. The

In the upper length of the arms of the said stirrup l'may edges of the parallel arms of said stirrup inclined slots or notches 2 are formed. These notches are preferably spaced apart so as to adapt the stirrup to be used-on walls of different thicknesses. In Figures land 2 I have illustrated three sets of notches or, slots 2 which incline from the upper edges of the arms of thestirrups downward and rearward. The outer notch, 'as 'showniinthe illustration, is at such a distance from the connecting member 1 which joins the two parallel arms of the stirrup, as to adapt the stirrup to be used on a building with a brick;

facing or veneer. On an ordinary frame building one of the other sets of notches slots or notches is to sustain a bracket of the form disclosed in this' a'pplication, said bracket carrying a bolt-15 adapted'to. seat in a pair of the slots or notches, tlieweightof the bracket tending to force the 'bolt'downward in the inclined slot and draw the bracket close to the wall, the heavier the weight upon the bracket the greater the tendency of the bracket to hug the wall.

The improved bracket consists of three. members 10, 11 and 12. The member 10 is slightly longer than the member 11, said members being pivoted together at one end. The member 12 extends between 'theother would be used; The purpose ofthe inclined I ends 'of'said members 10 and l l 'when the bracket is assembled in form for use, said bracket then constituting in outlinesubstantially a right angled triangle, of which members 10 and 11 define two of the sides and the member 12 the hypotenuse. I The members 10, '11 and 12 are formed of channel irons of different sizes in cross section. The largest cross section is in themember 12, the second largest in the member 10 and the smallest in the member 11. The

difference in size is such that the member 11 may fold within the channel of the member 10 and the members 10 and 11 may .fo-ld within the channel of the member12. The

together at one end by a boltv or rivet 13 so that they may fold with respect to each other. One end of the member 11 is pivoted to the members l0 and 12 are preferably connected I other end of the member 10 by a screw bolt 15, said bolt being long enough to project considerably on each side of the member 10 the projecting portions being adapted to seat within a pair of slots or notches 2 in the stirrup 1. Said bolt 15 is provided with washers and a suitable nut, or other means to prevent endwise displacement, as illustrated. The member 11 pivoted on the bolt 15 is adapted to fold and lie bet-ween the sides of the member 10, said member 11 being shorter than the member 10 and clearing the bolt 13. At 1 1 is shown a bolt adapted to be detach-ably passed through registered perforations 1617 in the outer ends of the members 11 and 12. This bolt may have a cotter pin in one end or, if preferred, be provided with a nut, and when said bolt is passed through the perforations in the member 11 and the member 12, the said members 10, 11 and 12 will be connected in the outline of a right angled triangle and will form a rigid bracket. When now the bolt 15 rests in a pair of slots 2 in the stirrup 1 the back of member 10 and the lower end of the member 12 will bear against the face of the wall of the building and constitute a rigid scaffold bracket. Scaffold planks may be bolted to the top of member .11 through bolt holes 18.

Owing to the fact that the members 10 and 11 are of different lengths either member 10 or 11 can be utilized for receiving the planks or boards of the scaffolding. Thus, by this bracket, scaffolds of different widths may be easily provided.

To detach the brackets it is only necessary to push or lift them upward whereupon they will be easily released from the inclined slots 2. lVhen thus released the bolt 14: may be removed and the bracket folded as indicated in Figure 3 until all three members 10, 11 and 12 lie approximately parallel making a convenient bracket to be transported from place to place.

The stirrups 1 may be knocked rearward and quickly detached from the building Wall,

ing of channeled shapes of different sizes makes the bracket extremely strong and light and susceptible of being folded into a compact article for convenience of transportation. The relative proportions of the channel members at right angles to each other are such as to render the bracket reversible for different widths of scaffolding and at the same time facilitate the folding. By reason of the described connections comprising the inclined slots 2 of the stirrup which receive the bolt 15 the bracket is caused to hug the wall more tightlythe more weight there is placed upon it.

Having described my invention in such manner as toenable those skilled in the art to which it appertains to make and use the same, what I claim and desire to secure by Letters Patents of the United States is:

1. A support for scafiolding brackets comprising a U-shaped stirrup having its parallel arms provided with slots extending downward from their upper edges and inclined rearward toward the member connecting said parallel arms.

2. The combination of a U-shaped stirrup adapted to embrace a stud, said stirrup having slots extending from the upper edges of its parallel arms, at an inclination downward. and rearward toward the member connecting said parallel arms, a bracket having a scaffold supporting member and a member adapted to rest against a wall, and a bolt projecting laterally from each side of said bracket adjacent the junction between said members said bolt adapted tobe seated in said inclined slots.

In testimony whereof I aflix my signature.

JOSEPH F. GRAFF. 

